Stapler



FIG. 1 is a perspective view of the stapler showing our new design;

FIG. 2 is a side elevational view thereof (the opposite side elevational view being a mirror image thereof);

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear end view thereof; and

FIG. 6 is a front view thereof. 

The ornamental design for a stapler, as shown and described. 